If you prefer Google Chrome (or any other browser) over Safari but use Safari because it's faster, I have the perfect jailbreak tweak for you. iPhone users can now give Chrome and other third party apps a speed boost with a new jailbreak tweak called Nitrous.
"Not only do the hard line figures speak volumes for this tweak, but I can actually attest to the fact that the tweak makes Chrome more responsive as well. Pages load faster, and you’ll notice an overall boost in snappiness and response as a result."
Jailbreakers can now use Nitrous and Ryan Petrich's BrowserChooser to break free of their Safari shackles. The tweak is $1 via Cydia’s BigBoss repo.